Plumbing valve



Nov. 13, 1951 c. P. WAGNER v 2,574,851

` PLUMBING VALVE Filed June so, 194s 'l u rragNEys atentecl ov. 13, 1951r 2,574,851@ Y rLUMcmG vL'vE 1 .Cletiis P. WagnerrMarysville, Ohio, assgnor to H; B; Salter. Mfg. Go., Marysville, Ohio, a corporation of Ohiov Atplieauoniune et, 194e, serial No. 36,154

This invention relatesv to improvements in plumbing valves, thatis to=s`ay plumbing valves o'f the type disclosed inco'pending lap'p'lication Serial No. 744,588, led April-29, 1947byFrank R. Holycross et al., which comprises avbody member and a stem member relatively movable in a longitudinaldirection, oneof said members carrying a oiiipressible O'ri`ng and the other memberfliavportswhich are causedlto pass Vthrough and beyond the sealing line of the O-ring asthevalve is caused'to move vfrom'ope'n to closed position. 1n cases Where theports are machined into of the relativelymovable members; thev burrs andsharp edges resulting -from .the machining operation must be removed, asotherwise destructive'wear on the Gering will esult. The removal of these burrs and'sharp edges* is Va tedious and expensive hand operation and due to the human element is not always properly performed.v In

accordance with the present invention the ports i's the provision of 'a plumbing valveoff-the char;

acter stated wherein wear on the O-ring shall bel insignificant and the yvalve maybe operated for' years' without servicing.

Another object is` the provision of ports of a f iclaims. (c1. 2er-127) for fStem I9.

character such that the flow of water through the valve may be metered. to anicety, especially throughout Jthe lower range of flow.V c Y A Still another object is the provisionof astem having a separate tip portion in which the ports may be economically formedwith rounded surfaces exclusively. Other. objects and featuresfoinovelty willappear as I proceed with the description of, that embodiment of the invention which, for the purposes of the present application, I have illustrated inthe accompanying drawing, inwhich u Fig. 1 is an elevational view largely in vertical section of a plumbing fixture having a valve embodying the invention, the valve being shown in closed position.

Fig. 2 is a fragmental similar view on a larger scale, showing the valve in fully open position.

Fig. 3 is a fragmental elevational view of the stem and tip, largely in section.

Fig. 4 is a transverse sectional view taken substantially onthe line 4-4 of Fig. 2.

Fig. 5 is a plan View of the cup shaped tip, looking into its open end.

Fig. 6 is a vertical sectional view taken sub- .stantially on the line 6 6 of Fig. 5, and

ilo

Fig. 7 is a bottom plan view of the tip.

In` the drawing there is shown a cast valve body ID of conventional form, having a horizontal partition wall II with a water passage I2 therethrough. The upper end of this passage is enlaged to provide an annular recess I3 in which is` `seateda soft rubber Oring Id.

'Y An upwardly extending portion of casting Il) is threaded at I5 to receive a' threaded hollow insert I6 which in effect` constitutes part of the valve body;VV This insert extends down to a level just above the partition II in order to substantially coni-ine O-ring I4 in recess I3. The inner surface' f The threaded portion of insert I6 extends above casting I0 a distance suicient to receive and firmly` hold a collar 20 in which there is a recess 2I for the accommodation of a second O-ring 22, which serves as a seal and a non-metallic bearing A second recess 23 of somewhat larger diameter receives a metal washer 2A which is locked in place against insert I6 by the collar 20 and serves to prevent substantial movement of ring 22 longitudinally of the stem.

Below the threads I 8 the stem has a constricted portion 26 which ends in an annular rib 21, and below this rib there is a spider comprising a plurality of radial arms 28, see Fig. 4. Below the coarse threads I'I ofthe insert, the latteris hol-A lowedA out to provide an annular chamber 29,

- from which a plurality of passages 30 extend radially outward into the delivery side of the faucet.

On the lower end of the stem there is mounted a tip 32, the upper portion of which is flush with the annular rib 2l and seats against that rib. In the illustrated case this tip is formed as a sheet metal stamping. It may be constructed also as 'a die casting if desired. When made as a stamping it is generally cup-shaped, and the base of the cup is perforated at 33 so that a machine screw 34 may be projected through the perforation and threadably mounted in the end of the stem, as indicated in Fig. 3.

Projecting backwardly from the base of the tip 32 there are a series of evenly spaced llutes 35 which have their greatest cross-sectional area at the bottom and taper o gradually toward the top, the flutes running out onto the cylindrical surface of the tip well below the upper edge thereof, as illustrated particularly in Figs. 2, 3

and 6. The number of flutes 35 is the same as the number of spider arms 28, and when the tip The surfaces of the flutes are rounded and no j sharp edges are presented to the O-ring I4 as the tip moves downwardly in a spiral path through the O-ring. The making of the tip as a stamp- 3 body member,y a stem movable endwise in said ing lends itself well to the requirement for smooth rounded surfaces where the flutes merge with the cylindrical surfaces of the tip. A similar 1 effect can be obtained by making the tip` as a die casting. In the latter event the walls of the tip would be somewhat thicker and the means for preventing rotation on the stem would be different from that illustrated. The formation of the tip by stamping or die casting are specific examples of what may be generally described as molding. Molding provides smooth rounded surfaces without grinding or polishing. The movement of the stem downward is limited by the engagement of the end of the tip with a shoulder 36 in the passage l2 through the partition Il.

With the valve in the open position illustrated in Fig. 2, water is free to flow upwardly through passage l2, through the flutes 35 into chamberv29 and out through passages 3Q into the delivery side of the faucet. The iiutes of course act as ports permitting the flow of water between the tip 32 and the Oring I4. Now, as the operator turns stem i9 clockwise, as viewed from above, the flutes 35 travel downward through the sealing line of ring i6, thereby gradually decreasing the size of the passages at the sealing line of the ring, until nally the flutes pass completely through this line or plane, and the O-ring rides onto the completely cylindrical surface above the flutes, as in Fig. 1 of the drawing. The flow of water from the intake to the delivery side of partition Il is thus completely cut off and the valve is closed. n

I-Iaving thus described my invention, I claim:

1..In a plumbing fixture, a valve comprising a body member, a stem movable endwise in said body member, a separable molded tip for said stem, means for detachably mounting said tip on the end of the stem, said tip having lengthwise flutes extending backwardly from the end of the tip, said flutes merging with the cylindrical Wall of the tip by means of curved surfaces exclusive-l ly, and a compressible O-ring in the body member constrained against material movement longitudinally of that member and adapted to closely engage the cylindrical surfaces of said tip, Whereby wear on the ring due to relative movement of the ring and tip is reduced to a minimum.

2. In a plumbing fixture, a valve comprising a body member, a stem movable endwise in said body member, a cup-shaped tip for said stem, said tip consisting of a sheet metal stamping having endwise ilutes therein extending backwardly from the end of the tip and merging smoothly with the cylindrical surface of the tip, a compressible O-ring in the body member constrained against material movement longitudinally of that member and adapted to closely engage the cylin f drical surfaces of said tip, whereby wear on the ring due to relative movement of the ring and tip is reduced to a minimum.

3. In a plumbing fixture, a valve comprising a body member, a separable molded tip for said stem, said tip having lengthwise iiutes extending backwardly from the end of the tip, said iiutes merging with the cylindrical wall of the tip by means of curved surfaces exclusively, said tip having a hole in its end, a fastening extending through said hole and threadably mounted in said stem, means for preventing rotation of the' tip on the stem, and a compressible O-ring in the body member constrained against material movement longitudinally of that member and adapted to closely engage the cylindrical surfaces of the tip, whereby wear on the ring due to relative movement of the ring and tip is reduced. to a minimum. y

4. In a plumbing fixture, a valve comprising a body member, a stem movable endwise in said body member, a cup-shaped tip forrsaid stem, said tip consisting of a sheet metal stamping having endwise iiutes therein extending backwardly from the end of the tip, said iiutes merging with the cylindrical wall of the tip by means of curved surfaces "exclusively, said tip havingy a hole in its end, a fastening extending through said hole and threadably mounted in said stem,v said stem having ribs entering the spaces b e-v tween flutes for preventing rotation of the tipV on the stem, and a compressible O-ringrin-the body member constrained against material movement longitudinally of that member and adapted to closely engage the cylindrical surfaces V'of the tip, whereby wear of the ring due to relative move?v ment of the'rng and tip is reduced to a minimum.,

CLETUS P. WAGNER'.

REFERENCES CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS Smith Oct. 17, 1944 

